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The SJ.1/P now supplies water to 30 public agencies throughout the state. The largest contract is with MWD for about one half of the project yield. Under the State Board's Decision 1485, issued in 1978, the firm yield of the State Water Project was estimated at 2.3 mil- lion acre-feet annually; the project has outstanding contracts for 4.2 million acre-feel. 24 CALIFORNIA WATER in general obligation bonds to assist in financing the construction of the state water facilities. In 1960, the voters of California approved the project and the method of financing. The facilities to be con- structed by this authorization were set forth in Water Code Section 12934(d). The State Water Project now supplies water to some 30 public agencies. The Metropolitan Water District of Southern California sigued the first contract with the Department of Water Resources on November 4, 1960. This contract became the prototype for all of the State Water Project water supply contracts. The contracting agencies and their contractual entitlements are set forth in Table 1-1. Although there are contracts for more than 4.2 million acre- feet, the dependable yield of the project under the 1978 decision of the State Water Resources Control Board (D-1485) is about 2.3 million acre-feet. More recent applications of the Endangered Species Act have reduced this yield further.32 See discussion in chapter 5. The State Water Project was constructed with financing from general obligation bonds, revenue bonds, and capital resources. The general obligation bonds are repaid by revenues from the water supply contractors. The contractors pay all capital, operating, and maintenance costs, whether or not they actually take water. Over the life of the contracts, until 2035, the contractors will pay $21.4 billion in fixed amounts.33 The water purchased is in addition to this cost. The State Water Project facilities function together in the following manner. Water released from the main storage facility, Lake Oroville, flows down the Feather River into the Sacramento River and then into the networked channels of the Sacramento-San Joaquin Delta. Near the northern edge of the Delta, water is diverted into the North Bay Aqueduct, delivering water to Napa and Solano counties. The water is transferred through the Delta in natural sloughs and channels. A cross-Delta transfer facility was originally planned but has not yet been built. At the southern edge of the Delta, 15 miles southwest of Stockton and 10 miles northwest of Tracy, are the Clifton Court Forebay and the Delta Pumping Plant. This plant is named for Harvey O. Banks, the distinguished State Engineer during much of the planning and construction of the State Water Project. The Clifton Court Forebay, which serves as a water regulating reservoir for the Delta pumping plant, ensures the reliability and flexibility of 32 Bulletin 160-83, page 16; Bulletin 3. pages xxv, 4; Bulletin 132-63, pages 9,17,21,156; Bulletin 132-88, page 4; Bulletin 160-87, page 43. 33 Bulletin 132-99, page 159; Bulletin 132-93, Appendix B.